M. E.  Rice, ?Larval development and metamorphosis in Sipuncula?, American Zoologist, vol. 16, pp. 563-571, 1976.

M. E.  Rice, ?Larval development and metamorphosis in Sipuncula?, American Zoologist, vol. 16, pp. 563-571, 1976.

M. E.  Rice, ?Observations on the development of six species of Caribbean Sipuncula with a review of development in the phylum?, in Proceedings of the International Symposium of Sipuncula and Echiura, M. E.  Rice and Todorovic, M., Eds. Belgrade: Naucno Delo Press, 1975, pp. 141-160.